Pea and broad bean pods: not hardness but fibre, which behaves like a short piece of string around the plate. This needs a top-range model: the piece is picked up again and again until it is small enough to flow. Pea and broad bean pods have a fibrous inner lining: in short pieces, a few at a time. If you have a whole crate, most of it goes in the food waste bin. They're fibrous: cut them short, a few at a time. If you produce a lot of it, it is worth checking your water utility’s rules.